就是说，勤动脑才好。所以要做有挑战性的锻炼，不断学习和提高，这样脑和身体都得到了锻炼。

来源: lawattaction 于 2019-04-28 09:34:56 [旧帖] [给我悄悄话] 本文已被阅读：次

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